.viewerBtn {
  margin: 0 3px;
  line-height: 1.4;
  background: #fdfdfd;
  cursor: pointer;
  border: 1px solid #e0e0e0;
  min-width: 54px;
  padding: 6px 14px;
  font-size: 14px;
  border-radius: 4px;
}